Ps2 Wjec context and aims

It has been assumed that eyewitness testimony is accurate enough to be used as the only evidence for procecution , however research has shown inaccurate memory is the main factor leadint to false convictions, playing a role in over 75% of convictions that were overturned by DNA testing.
-- One explanation is that leading questions by officials after a crime may alter eye witness perception of event - ( a leading question leads the witness to a desired answer) -